First Kate sprayed any stubborn marks with the Stain Go and then she ran a bath with lukewarm water, adding several scoops of SARD.

Then she gently massaged the dress, being careful of its intricate beading.

She also used tweezers to pull out shards of grass that had become tangled in the train and left it to soak for 30 minutes.

Kate Writer refused to pay the extortionate fees several dry cleaners quoted to clean her gown, so she did it herself for $15. Picture: Dedikated Lifestyle

"The water is pretty gross, but look how much has come out," she said in a video shared to her Instagram. "All the tan has come off the inside and the lace at the bottom, is white again.

"It's 100 per cent white again."

At this stage, Kate then emptied the bath and filled it with clean water to repeat the steps again for a second time.

"It's come up so nicely. The silk is so white now, beautiful," she explained, revealing she was moving the water-soaked dress outside to an airdryer on her balcony. However, she made sure it wasn't in direct sunlight as that could affect the colour.

Her bath water was so dirty, she had to do two rounds. Picture: Dedikated Lifestyle

Once dry - which took several days because there's so much material - she removed the remaining stubborn grass with tweezers, revealing that was the most frustrating part of the process.

After, she was thrilled with the result.

"Everything completely lifted, it was amazing," she told news.com.au.

Kate - a successful body positive ambassador - said people warned her against the bold hack, but she decided to give it a shot anyway.

The dress has come up beautifully with the bargain method. Picture: Dedikated Lifestyle

Would you take a risk like this with your precious wedding gown? Or do you agree that the wedding industry gets away with overcharging people? Let us know your thoughts below.